196 lines
7.3 KiB
C
196 lines
7.3 KiB
C
#ifndef __SOUND_SEQ_MIDI_EMUL_H
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#define __SOUND_SEQ_MIDI_EMUL_H
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/*
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* Midi channel definition for optional channel management.
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*
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* Copyright (C) 1999 Steve Ratcliffe
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "seq_kernel.h"
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/*
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* This structure is used to keep track of the current state on each
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* channel. All drivers for hardware that does not understand midi
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* directly will probably need to use this structure.
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*/
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typedef struct snd_midi_channel {
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void *private; /* A back pointer to driver data */
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int number; /* The channel number */
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int client; /* The client associated with this channel */
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int port; /* The port associated with this channel */
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unsigned char midi_mode; /* GM, GS, XG etc */
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unsigned int
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drum_channel:1, /* Drum channel */
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param_type:1 /* RPN/NRPN */
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;
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unsigned char midi_aftertouch; /* Aftertouch (key pressure) */
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unsigned char midi_pressure; /* Channel pressure */
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unsigned char midi_program; /* Instrument number */
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short midi_pitchbend; /* Pitch bend amount */
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unsigned char control[128]; /* Current value of all controls */
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unsigned char note[128]; /* Current status for all notes */
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short gm_rpn_pitch_bend_range; /* Pitch bend range */
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short gm_rpn_fine_tuning; /* Master fine tuning */
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short gm_rpn_coarse_tuning; /* Master coarse tuning */
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} snd_midi_channel_t;
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/*
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* A structure that represets a set of channels bound to a port. There
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* would usually be 16 channels per port. But fewer could be used for
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* particular cases.
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* The channel set consists of information describing the client and
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* port for this midi synth and an array of snd_midi_channel_t structures.
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* A driver that had no need for snd_midi_channel_t could still use the
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* channel set type if it wished with the channel array null.
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*/
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typedef struct snd_midi_channel_set {
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void *private_data; /* Driver data */
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int client; /* Client for this port */
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int port; /* The port number */
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int max_channels; /* Size of the channels array */
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snd_midi_channel_t *channels;
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unsigned char midi_mode; /* MIDI operating mode */
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unsigned char gs_master_volume; /* SYSEX master volume: 0-127 */
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unsigned char gs_chorus_mode;
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unsigned char gs_reverb_mode;
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} snd_midi_channel_set_t;
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typedef struct snd_seq_midi_op {
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void (*note_on)(void *private_data, int note, int vel, snd_midi_channel_t *chan);
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void (*note_off)(void *private_data,int note, int vel, snd_midi_channel_t *chan); /* release note */
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void (*key_press)(void *private_data, int note, int vel, snd_midi_channel_t *chan);
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void (*note_terminate)(void *private_data, int note, snd_midi_channel_t *chan); /* terminate note immediately */
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void (*control)(void *private_data, int type, snd_midi_channel_t *chan);
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void (*nrpn)(void *private_data, snd_midi_channel_t *chan, snd_midi_channel_set_t *chset);
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void (*sysex)(void *private_data, unsigned char *buf, int len, int parsed, snd_midi_channel_set_t *chset);
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} snd_midi_op_t;
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/*
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* These defines are used so that pitchbend, aftertouch etc, can be
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* distinguished from controller values.
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*/
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/* 0-127 controller values */
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#define MIDI_CTL_PITCHBEND 0x80
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#define MIDI_CTL_AFTERTOUCH 0x81
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#define MIDI_CTL_CHAN_PRESSURE 0x82
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/*
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* These names exist to allow symbolic access to the controls array.
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* The usage is eg: chan->gm_bank_select. Another implementation would
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* be really have these members in the struct, and not the array.
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*/
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#define gm_bank_select control[0]
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#define gm_modulation control[1]
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#define gm_breath control[2]
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#define gm_foot_pedal control[4]
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#define gm_portamento_time control[5]
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#define gm_data_entry control[6]
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#define gm_volume control[7]
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#define gm_balance control[8]
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#define gm_pan control[10]
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#define gm_expression control[11]
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#define gm_effect_control1 control[12]
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#define gm_effect_control2 control[13]
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#define gm_slider1 control[16]
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#define gm_slider2 control[17]
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#define gm_slider3 control[18]
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#define gm_slider4 control[19]
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#define gm_bank_select_lsb control[32]
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#define gm_modulation_wheel_lsb control[33]
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#define gm_breath_lsb control[34]
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#define gm_foot_pedal_lsb control[36]
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#define gm_portamento_time_lsb control[37]
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#define gm_data_entry_lsb control[38]
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#define gm_volume_lsb control[39]
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#define gm_balance_lsb control[40]
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#define gm_pan_lsb control[42]
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#define gm_expression_lsb control[43]
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#define gm_effect_control1_lsb control[44]
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#define gm_effect_control2_lsb control[45]
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#define gm_sustain control[MIDI_CTL_SUSTAIN]
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#define gm_hold gm_sustain
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#define gm_portamento control[MIDI_CTL_PORTAMENTO]
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#define gm_sostenuto control[MIDI_CTL_SOSTENUTO]
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/*
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* These macros give the complete value of the controls that consist
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* of coarse and fine pairs. Of course the fine controls are seldom used
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* but there is no harm in being complete.
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*/
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#define SNDRV_GM_BANK_SELECT(cp) (((cp)->control[0]<<7)|((cp)->control[32]))
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#define SNDRV_GM_MODULATION_WHEEL(cp) (((cp)->control[1]<<7)|((cp)->control[33]))
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#define SNDRV_GM_BREATH(cp) (((cp)->control[2]<<7)|((cp)->control[34]))
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#define SNDRV_GM_FOOT_PEDAL(cp) (((cp)->control[4]<<7)|((cp)->control[36]))
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#define SNDRV_GM_PORTAMENTO_TIME(cp) (((cp)->control[5]<<7)|((cp)->control[37]))
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#define SNDRV_GM_DATA_ENTRY(cp) (((cp)->control[6]<<7)|((cp)->control[38]))
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#define SNDRV_GM_VOLUME(cp) (((cp)->control[7]<<7)|((cp)->control[39]))
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#define SNDRV_GM_BALANCE(cp) (((cp)->control[8]<<7)|((cp)->control[40]))
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#define SNDRV_GM_PAN(cp) (((cp)->control[10]<<7)|((cp)->control[42]))
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#define SNDRV_GM_EXPRESSION(cp) (((cp)->control[11]<<7)|((cp)->control[43]))
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/* MIDI mode */
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#define SNDRV_MIDI_MODE_NONE 0 /* Generic midi */
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#define SNDRV_MIDI_MODE_GM 1
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#define SNDRV_MIDI_MODE_GS 2
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#define SNDRV_MIDI_MODE_XG 3
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#define SNDRV_MIDI_MODE_MT32 4
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/* MIDI note state */
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#define SNDRV_MIDI_NOTE_OFF 0x00
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#define SNDRV_MIDI_NOTE_ON 0x01
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#define SNDRV_MIDI_NOTE_RELEASED 0x02
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#define SNDRV_MIDI_NOTE_SOSTENUTO 0x04
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#define SNDRV_MIDI_PARAM_TYPE_REGISTERED 0
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#define SNDRV_MIDI_PARAM_TYPE_NONREGISTERED 1
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/* SYSEX parse flag */
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enum {
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SNDRV_MIDI_SYSEX_NOT_PARSED = 0,
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SNDRV_MIDI_SYSEX_GM_ON,
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SNDRV_MIDI_SYSEX_GS_ON,
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SNDRV_MIDI_SYSEX_GS_RESET,
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SNDRV_MIDI_SYSEX_GS_CHORUS_MODE,
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SNDRV_MIDI_SYSEX_GS_REVERB_MODE,
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SNDRV_MIDI_SYSEX_GS_MASTER_VOLUME,
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SNDRV_MIDI_SYSEX_GS_PROGRAM,
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SNDRV_MIDI_SYSEX_GS_DRUM_CHANNEL,
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SNDRV_MIDI_SYSEX_XG_ON,
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};
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/* Prototypes for midi_process.c */
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void snd_midi_process_event(snd_midi_op_t *ops, snd_seq_event_t *ev,
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snd_midi_channel_set_t *chanset);
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void snd_midi_channel_set_clear(snd_midi_channel_set_t *chset);
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snd_midi_channel_set_t *snd_midi_channel_alloc_set(int n);
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void snd_midi_channel_free_set(snd_midi_channel_set_t *chset);
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#endif /* __SOUND_SEQ_MIDI_EMUL_H */
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